Answer :
Answer:
9 more weeks!
if you add 10 each week you find out.
Step-by-step explanation:
1 more week will be $109, 2 more weeks will be $119, 3 more weeks, $129, 4 more weeks $139, 5 more weeks will now be $149, the 6th week is $159, the 7th week is $169, the 8th week is $179, the 9th week will be $189. $189 is precisely what she needs for the camera.